/*
 * Copyright 2016 Azavea
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package geotrellis.raster.hydrology

import geotrellis.raster.mapalgebra.focal.Square
import geotrellis.raster.Tile
import geotrellis.util.MethodExtensions


trait HydrologyMethods extends MethodExtensions[Tile] {
  def accumulation(): Tile = Accumulation(self)

  /**
    * Operation to compute a flow direction raster from an elevation
    * raster.
    */
  def flowDirection(): Tile = FlowDirection(self)

  /**
    * Fills sink values in a raster. Returns a Tile of
    * DoubleConstantNoDataCellType.
    */
  def fill(threshold: Double): Tile = Fill(self, Square(1), None, threshold)
}
